CareerPlan

Machine Learning Engineer - Reinforcement Learning

ParisFull-time2026-07-03 → 2026-11-11

Core

Building training, evaluation, and tooling systems for LLM-powered AI agents and reinforcement learning to solve autonomous supply chain challenges.

Role type

Senior Machine Learning Engineer (Reinforcement Learning & LLM Agents)

Builds

Production AI decision-making products, agent environments, and evaluation frameworks for supply chain optimization.

Domain

Supply Chain / Logistics / Applied AI

Deliverable

production ML models

Required skills

Reinforcement Learning (RL), LLM fine-tuning, reward modeling, Python, PyTorch, agent environment design, data pipeline construction, evaluation framework development

Preferred skills

Human-in-the-loop ML systems, open-ended task evaluation, supply chain domain knowledge, side projects demonstrating engineering curiosity

Technologies

Python, PyTorch, LLMs, RLHF, RLAIF

Responsibilities

Design and implement LLM-powered agent environments for supply chain decision-making; Fine-tune, adapt, and evaluate LLMs for domain-specific reasoning; Design, test, and iterate on reward functions to capture desired agent behaviors; Review LLM traces and rollouts to identify reward hacking and shortcut behaviors; Build evaluation frameworks to measure model quality and agent performance; Create data pipelines for training, fine-tuning, and human feedback collection; Develop tooling to improve team workflows for building and deploying AI-assisted systems.

Seniority

Senior, hands-on IC